Reinforcing device for concrete structures.



J. T. SIMPSON.

REINFORCING DEVICE FOR CONGRETE STRUCTURES.

APPLICATION FILED JULY 11; 1908.

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` Patented Nov. 17.1908.

. I `UNITED STATES PATENT orrion.

JOHN T'. SIMPSON, OF NEWARK, NEW JERSEY.v

REINFORCING DEVICE FOR CONCRETE STRUCTURES.

Specification of Letters Patent.

Patented Nov. 17, 1908.

Application sied July 11, 190s. serial no. 44ans.

To all 'whom 'it may concern:

Be it known that I, JOHN T. SIMPSON, a citizen of the United States, and residing at Newark, in the county of Essex and State of New Jersey, have invented certain netv and useful Improvements' in Reinforcing Devices for Concrete Structures, of which the A'following is a specification, such as will enable those skilled inthe art to which it appertains to make 'and use the same.

My presentinvention consists of an improved reinforcing metal device for use in slabs, beams, girders, columns, partitions, arches, walls and the like, can be strengthened and cheapened by the introduction vof a reinforcing element to provide for tension and shearing stresses.

The objects `of this invention are to provide a metal reinforcing device of the class specified formed from a rolled shape, and consisting of a. unit in which the total area of the device is used to provide forjtli'e teny sion stresses at the center near the bottom of the reinforced member, where the tension stresses are generally maximum, and at the same time to form a trnssed frame or device in whichv a part of the area is -used to provide for the horizontal'andvertical shearing stresses near the ends of the reinforced member Where the shearing stresses are generally maximum, and all the parts of which device are firmly attached to each other Without resorting to a-meohanical, electrical, chemical or other means of attachment, thus providing a reinforcing deviceof the class specified in which there are no loose bars, rods or other parts which through carelessness or ignorance of Workmen may.l be

omitted during the installation, thus lWeakening the construction; a further object of my invention being to provide a reinforcing device of the class specied .formed from a rolled shape or unit, which can be kept in stock for distribution and from which reinforcing devices to suit 'any .given requirements of reinforcing can be quickly made and delivered, thus eliminating long and costly delays land which devices can be in ade singly or inmultiples and which when made in single units can be readily made into multiple units by the use of clamps or other.

similar devices when the stresses in the of concrete, Which l member which is being reinforced requires single unit.

The invention is fully disclosed in the following specification, of Which the accompanying drawing forms a part, in which the separate parts of my improvement are desigeach of the' views, and in Whichg- Figure l is a cross sectional View of a concrete structure showing my improved reinforcing device embedded therein; Fig. 2 a side view of the rolled shaps -or unit from which the reinforcing device is made; Fig. 3 a View similar to Fig. 2 but on a larger scale and showing one step in the process of forming the reinforcing device from said vrolled shape or unit; and, Fig. 4f a transverse` section on the line 4 4 of Fig. 3, but on a still larger scale. Y

In Fig. l of the drawing I have shown 'a concrete structure 'a such as is usually employed inv the Hoor and ceiling Work of buildings, that part of said floor and ceiling tween which is placed my improved reinforcing device.

My'improved reinforcing device is formed from a rolled shape or unit b shown in Figs. 2, 3 and l and consisting of three parallel bars b2,- bs and b4 connected by Webs b? and L@ all of said bars and Webs being in the same plane, the Webs b5 andb being also much thinner than said bars, and the central* bar Fr* being preferably of -less transverse dimensions than the side bars b2 and b4.

In practice the web members b5 and are sheared to form longitudinal and transverse slits at the opposite sides of the central portion of the device, the method of shearing one end portion of said Webs being clearly shown in Fig. 3, in which only one end portion of the device is shown, the longitudinal portions of the slits being shown at o and the transverse portions at c2, said transverse portions extending through the central bar b3 of the rolled form or unit.

In the construction shown there are three each end portion of the reinforcing device, and adjacent to the central portion of the -deviceoneof the Webs, the web b5, is slitted nated by suitablel reference characters in-p Work showninvolving tivo I beams a2 beof the longitudinal and transverse slits in more area of metal than is provided in a v v.the end longitudinally only as shownv at c*a and when vthe webs b and b are slitted vin t e manner described' the `end portions ofboth webs and the end portions of the central bar 68 are clit out as shown at d in Fi 3, after which ortions of one of t e side bars. are expande or separated from the end portions oi the other side baras clearly shown in Fig. 1, the said end portions of the side bars being 'connected by diagonal rib members e formed byslitting the webs b5 and b longitudinally, and the central bar 53 transversely as shownin Fig. 3. It will also be seen that the end portions of the separated or expanded side bars are parallel, and the middle portions thereof are also parallel, but the middle portion of the reinforcing device is' of the width vof the originalrolled shape or l vunit only, whereas the end portions of the reinforcing device are much wider, and in lexpanding `one of the side bars as shown i Fig. l the parts thereof adjacent to the centralv ortion of the device'are curved .out-v war y and in the direction of the ends of 'the device as-shown at f.

One method of using which the ends of the bar b5 overlap the I 4beams a2 and are provided with hooks g tions.

The device described and claimed herein is an improvement on that described and claimed in a prior application filed by me Dec. 17, 1907, Ser. #406,864, and, in practice, the reinforcing device described and claimed herein may be used single as shown and described, or it may be used in multiple units as shown and described -in said prior application and in the same relations and for the same purposes described and claimed posite sides of the central portion of the device being slitted longitudinally and trans-` versely at intervals, the transverse portions of said slits extending through the central bar, and the end portions of one of the side v my kimproved rein` forcing device is clearly shown in Fig. 1," in

eeaeoe 2. A metal reinforcing device ioi' use in.

concrete constructions composed of three parallel bars connected by webs of less thickness than said bars, the said webs at the opposite sides vof the central portion of .the device being slitted longitudinally and transversely at intervals, the transverse portions of said slits extending through the central bar, and the end ortions of .one of the side bars being expan ed or separated from the end portions of the other side bar and being connected therewith by diagonal members formed from the central bar, said central bar being also of less transverse dimensions than the side bars. i

3. A metal reinforcing device for use in concrete constructions com osed Vof three parallel bars connected by we s of less thickness than said bars, the said webs at the oposite sides of the .central portion'of the l evice bein slitted longitudinally and transversely at intervals, the transversel portions `of said slits extending through the central bar, and the endv ortions of one of the side bars being expan ed or separated from the end portions of the other side bar and being 'connected therewith by diagonal membersformed from 'the central bar, vsaid central 'bar being also of less transverse dimensions than the side bars, and the slits in one ofthe web members adjacent to the central portion of the device being longitudinal slits only.

4. A metal reinforcing device for use in concrete constructions composed of three parallelbars connected by webs of less thickness than said bars, the central bar being also of less transverse dimensions thanthe side bars, but said webs at the opposite sides of the central portion of the device 'being slitted longitudinally and transversely at intervals, the transverse portions of said slits extending through4 the central bar, and the v end portions of one of the side bars being expanded or separated from the en d portions of the other `side bar and being connected therewith by diagonal members formed from the central bar.

5. A4 metal lreinforcing device for use vinv concrete constructions composed of three o parallel bars connected by webs of less thickness thansaid bars, the central bargbeing also of y'less transversedimensions than the side bars, but said webs at the opposite sides of the central portion lof the device being slitted longitudinally and transversely at intervals, the transverse portions of said slits extending through the central bar, and the end portions of one of the side bars being expanded or yseparated from the end portions lie of the other side bar and being connected presence of the subscribing Witnesses this therewith by diagonal members formed from 10th day of July 1908. the central bar, the slits in lone of the Webs adjacent to the central portion of the device JOHN T' IMPSON' 5 being longitudinal slits only. Witnesses: l

In testimony that I claim the foregoing as A. R. ArPLEMAn, my invention I have signed my name in i C.' E. MULREANY. 

